Here is the odd thing... it did NOT turn on the CEL! My Dashhawk monitors whether the car is in open loop, closed loop, modified loop, etc. Well after a couple of spirited take off I notice that the Dashhawk was indicating the car was operating in "Closed Loop with Problems"... What the... So any ways on a whim I decided to look for codes... sure enough it pulled up the p2097. I cleared the code and now I'm back to normal closed loop...

I did notice on a very hard accel and then if you left of the gas really fast the O2 will go to 0mv... wonder if that's what's tripping it... might want to ask your service guy?????